Update app.py

app.py

@@ -654,8 +654,8 @@ with gr.Blocks(theme='gradio/soft',js=js_func) as demo:
         df['Positive_ratio'] = df['Positive'] / df['Total_paragraphs']*100
         df['Negative_ratio'] = df['Negative'] / df['Total_paragraphs']*100
         df['Date'] = pd.to_datetime(df['Date']) 
-        start_date = df['Date'].min().to_pydatetime()
-        end_date = df['Date'].max().to_pydatetime()
+        start_date = str(df['Date'].min())
+        end_date = str(df['Date'].max())
         with gr.Row():
             start = gr.DateTime(start_date, label="Start")
             end = gr.DateTime(end_date, label="End")